Precision frequency measurements with entangled states

Details Precision frequency measurements with entangled states Precision frequency measurements with entangled states

2005-08-19

arxiv.org/abs/quant-ph/0508148v1

Physics

Quantum Physics

4 pages, 1 figure

Scientific paper

We demonstrate how quantum entanglement can be used for precision frequency measurements with trapped ions. In particular, we show how to suppress linear Zeeman shifts in optical frequency measurements by using maximally entangled states of two ions even if the individual ions do not have any field-independent transition. In addition, this technique allows for an accurate measurement of small external field frequency shifts such as the electric quadrupole shift which are important for ion clock experiments.

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